/* ====================================================
   교육 테마 - default.css
   그누보드5 교육/학원/강의 테마
   Wix Template 2711 (Classroom) 스타일 참고
   밝고 생동감 있는 교육 브랜드
   ==================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700;900&family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900;1,700&family=Fredoka+One&display=swap');

/* ── CSS Variables ── */
:root {
    --blue:         #3B82F6;
    --blue-dark:    #2563EB;
    --blue-light:   #60A5FA;
    --blue-pale:    rgba(59,130,246,.1);
    --purple:       #8B5CF6;
    --purple-pale:  rgba(139,92,246,.1);
    --green:        #10B981;
    --green-pale:   rgba(16,185,129,.1);
    --orange:       #F59E0B;
    --orange-pale:  rgba(245,158,11,.1);
    --pink:         #EC4899;
    --pink-pale:    rgba(236,72,153,.1);
    --red:          #EF4444;
    --white:        #FFFFFF;
    --off-white:    #F9FAFB;
    --bg:           #F0F4FF;
    --bg2:          #FFF8F0;
    --gray-50:      #F9FAFB;
    --gray-100:     #F3F4F6;
    --gray-200:     #E5E7EB;
    --gray-300:     #D1D5DB;
    --gray-400:     #9CA3AF;
    --gray-500:     #6B7280;
    --gray-600:     #4B5563;
    --gray-700:     #374151;
    --dark:         #1E1B4B;
    --dark2:        #312E81;
    --font-display: 'Fredoka One', 'Nunito', sans-serif;
    --font-body:    'Nunito', 'Noto Sans KR', sans-serif;
    --font-kr:      'Noto Sans KR', sans-serif;
    --ease:         cubic-bezier(.4,0,.2,1);
    --trans:        all .25s var(--ease);
    --trans-slow:   all .55s var(--ease);
    --shadow-xs:    0 1px 4px rgba(0,0,0,.06);
    --shadow-sm:    0 2px 10px rgba(0,0,0,.08);
    --shadow-md:    0 6px 24px rgba(0,0,0,.1);
    --shadow-lg:    0 14px 44px rgba(0,0,0,.12);
    --shadow-xl:    0 24px 56px rgba(0,0,0,.15);
    --radius-sm:    8px;
    --radius-md:    14px;
    --radius-lg:    20px;
    --radius-xl:    28px;
    --radius-full:  999px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-kr);
    background: var(--white);
    color: var(--gray-700);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
hr { display: none; }

/* ====================================================
   HEADER
   ==================================================== */
#hd {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: 72px;
    background: var(--white);
    border-bottom: 2px solid var(--gray-100);
    display: flex;
    align-items: center;
    transition: var(--trans);
}
#hd.scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--gray-200);
}
#hd_h1 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

#hd_wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
}

/* Logo */
#logo { flex-shrink: 0; margin-right: auto; }
#logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--trans);
}
#logo a:hover { opacity: .85; }
#logo img { height: 34px; width: auto; }
.logo-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--white);
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(59,130,246,.3);
}
.logo-text-wrap { display: flex; flex-direction: column; gap: 1px; }
.logo-main {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--dark);
    line-height: 1;
    letter-spacing: .01em;
}
.logo-sub {
    font-family: var(--font-kr);
    font-size: .57rem;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: .06em;
    line-height: 1;
}

/* GNB */
#gnb { margin-right: 20px; }
#gnb h2 { display: none; }
#gnb_1dul { display: flex; align-items: center; list-style: none; }
.gnb_mnal { display: none; }
.gnb_1dli { position: relative; }
.gnb_1da {
    display: block;
    padding: 8px 13px;
    font-family: var(--font-kr);
    font-size: .84rem;
    font-weight: 600;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
    transition: var(--trans);
}
.gnb_1da:hover { color: var(--blue); background: var(--blue-pale); }

/* Dropdown */
.gnb_2dul {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transition: var(--trans);
    z-index: 999;
    overflow: hidden;
}
.gnb_2dul .bg { display: none; }
.gnb_2dul ul { padding: 6px; }
.gnb_2da {
    display: block;
    padding: 9px 13px;
    font-size: .82rem;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
    transition: var(--trans);
}
.gnb_2da:hover { color: var(--blue); background: var(--blue-pale); }
.gnb_1dli:hover .gnb_2dul,
.gnb_1dli:focus-within .gnb_2dul {
    opacity: 1; visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Header Right */
.hd_login { display: flex; align-items: center; gap: 8px; list-style: none; }
.hd_login li a {
    font-family: var(--font-kr);
    font-size: .82rem;
    font-weight: 600;
    color: var(--gray-500);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: var(--trans);
}
.hd_login li a:hover { color: var(--blue); background: var(--blue-pale); }
.hd_login li:last-child a {
    background: linear-gradient(135deg, var(--blue), var(--purple));
    color: var(--white);
    font-weight: 700;
    border-radius: var(--radius-full);
    padding: 9px 20px;
    box-shadow: 0 4px 12px rgba(59,130,246,.25);
}
.hd_login li:last-child a:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(59,130,246,.35);
}

/* Mobile Menu */
#gnb_all {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--white);
    z-index: 9999;
    flex-direction: column;
    padding: 80px 32px 40px;
    overflow-y: auto;
}
#gnb_all.open { display: flex; }
.gnb_al_ul { width: 100%; }
.gnb_al_li { border-bottom: 1px solid var(--gray-100); }
.gnb_al_a {
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--dark);
    padding: 16px 0;
    transition: var(--trans);
    letter-spacing: .01em;
}
.gnb_al_a:hover { color: var(--blue); padding-left: 10px; }
.gnb_al_ul ul { padding: 0 0 12px 12px; }
.gnb_al_ul ul li a { display: block; font-size: .88rem; color: var(--gray-500); padding: 7px 0; transition: var(--trans); }
.gnb_al_ul ul li a:hover { color: var(--blue); }
.gnb_close_btn {
    position: absolute;
    top: 20px; right: 24px;
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
    color: var(--gray-400);
    border: 2px solid var(--gray-200);
    border-radius: 50%;
    transition: var(--trans);
}
.gnb_close_btn:hover { color: var(--blue); border-color: var(--blue); }
#gnb_all_bg { display: none; }

/* ====================================================
   WRAPPER / CONTAINER (서브)
   ==================================================== */
body { padding-top: 72px; }
#wrapper { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
#container_wr { display: flex; gap: 40px; padding: 56px 0 100px; }
#container { flex: 1; min-width: 0; }
#container_title {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 32px;
    padding-bottom: 18px;
    border-bottom: 3px solid var(--gray-100);
    position: relative;
    letter-spacing: .01em;
}
#container_title::after {
    content: '';
    position: absolute;
    bottom: -3px; left: 0;
    width: 52px; height: 3px;
    background: linear-gradient(90deg, var(--blue), var(--purple));
    border-radius: 2px;
}
#aside { width: 260px; flex-shrink: 0; }

/* ====================================================
   HERO
   ==================================================== */
.co-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #EEF2FF 0%, #F0FFFE 50%, #FFF7ED 100%);
}
/* 배경 장식 원들 */
.co-hero-circle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.co-hero-circle-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(59,130,246,.12) 0%, transparent 70%);
    top: -100px; right: -100px;
}
.co-hero-circle-2 {
    width: 350px; height: 350px;
    background: radial-gradient(circle, rgba(139,92,246,.1) 0%, transparent 70%);
    bottom: -80px; left: 10%;
}
.co-hero-circle-3 {
    width: 200px; height: 200px;
    background: radial-gradient(circle, rgba(245,158,11,.12) 0%, transparent 70%);
    top: 30%; right: 25%;
}
/* 우측 일러스트 영역 */
.co-hero-illust {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 40%;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    pointer-events: none;
}
.co-hero-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: var(--shadow-md);
    animation: floatUp 3s ease-in-out infinite;
}
.co-hero-card:nth-child(2) { animation-delay: 1s; margin-left: 48px; }
.co-hero-card:nth-child(3) { animation-delay: 2s; margin-left: 24px; }
@keyframes floatUp {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.co-hero-card-icon {
    width: 44px; height: 44px;
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.co-hero-card-icon.blue   { background: var(--blue-pale);   color: var(--blue); }
.co-hero-card-icon.purple { background: var(--purple-pale); color: var(--purple); }
.co-hero-card-icon.green  { background: var(--green-pale);  color: var(--green); }
.co-hero-card-icon.orange { background: var(--orange-pale); color: var(--orange); }
.co-hero-card-text h4 { font-family: var(--font-kr); font-size: .88rem; font-weight: 700; color: var(--dark); margin-bottom: 2px; }
.co-hero-card-text p  { font-size: .72rem; color: var(--gray-400); }

/* Hero Content */
.co-hero-inner {
    position: relative;
    z-index: 3;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 120px 40px 100px;
}
.co-hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    animation: fadeUp .5s .1s var(--ease) both;
}
.co-hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .04em;
}
.co-hero-tag.blue   { background: var(--blue-pale);   color: var(--blue-dark); border: 1px solid rgba(59,130,246,.2); }
.co-hero-tag.purple { background: var(--purple-pale); color: var(--purple); border: 1px solid rgba(139,92,246,.2); }
.co-hero-tag.green  { background: var(--green-pale);  color: var(--green); border: 1px solid rgba(16,185,129,.2); }

.co-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5vw, 4.2rem);
    color: var(--dark);
    line-height: 1.15;
    letter-spacing: .01em;
    margin-bottom: 20px;
    max-width: 560px;
    animation: fadeUp .5s .15s var(--ease) both;
}
.co-hero h1 .hl-blue   { color: var(--blue); }
.co-hero h1 .hl-purple { color: var(--purple); }
.co-hero h1 .hl-orange { color: var(--orange); }

.co-hero-desc {
    font-family: var(--font-kr);
    font-size: .96rem;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.85;
    max-width: 440px;
    margin-bottom: 40px;
    animation: fadeUp .5s .2s var(--ease) both;
}
.co-hero-btns {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    animation: fadeUp .5s .25s var(--ease) both;
}
/* Stats */
.co-hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-top: 52px;
    padding-top: 28px;
    border-top: 2px solid var(--gray-100);
    animation: fadeUp .5s .35s var(--ease) both;
    flex-wrap: wrap;
}
.co-hero-stat-num {
    font-family: var(--font-display);
    font-size: 1.9rem;
    color: var(--dark);
    line-height: 1;
}
.co-hero-stat-num span { color: var(--blue); }
.co-hero-stat-label { font-size: .72rem; color: var(--gray-400); margin-top: 4px; font-weight: 600; }
.co-hero-stat-div { width: 1px; height: 36px; background: var(--gray-200); }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn-blue {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: var(--white);
    font-family: var(--font-kr);
    font-size: .88rem; font-weight: 700;
    padding: 13px 26px;
    border-radius: var(--radius-full);
    border: none;
    transition: var(--trans);
    box-shadow: 0 4px 14px rgba(59,130,246,.3);
}
.btn-blue:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,.4); }
.btn-purple {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--purple), #7C3AED);
    color: var(--white);
    font-family: var(--font-kr);
    font-size: .88rem; font-weight: 700;
    padding: 13px 26px;
    border-radius: var(--radius-full);
    transition: var(--trans);
    box-shadow: 0 4px 14px rgba(139,92,246,.3);
}
.btn-purple:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(139,92,246,.4); }
.btn-outline-dark {
    display: inline-flex; align-items: center; gap: 8px;
    background: transparent;
    color: var(--gray-700);
    font-family: var(--font-kr);
    font-size: .88rem; font-weight: 700;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    border: 2px solid var(--gray-300);
    transition: var(--trans);
}
.btn-outline-dark:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-pale); }
.btn-white {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--white);
    color: var(--blue-dark);
    font-family: var(--font-kr);
    font-size: .88rem; font-weight: 700;
    padding: 13px 26px;
    border-radius: var(--radius-full);
    border: 2px solid var(--white);
    transition: var(--trans);
    box-shadow: var(--shadow-sm);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ====================================================
   SECTION COMMON
   ==================================================== */
.co-section { padding: 96px 0; }
.co-section-inner { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.co-label {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font-kr);
    font-size: .72rem; font-weight: 700; letter-spacing: .08em;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 14px;
}
.co-label.blue   { background: var(--blue-pale);   color: var(--blue-dark); border: 1px solid rgba(59,130,246,.18); }
.co-label.purple { background: var(--purple-pale); color: var(--purple); border: 1px solid rgba(139,92,246,.18); }
.co-label.green  { background: var(--green-pale);  color: var(--green); border: 1px solid rgba(16,185,129,.18); }
.co-label.orange { background: var(--orange-pale); color: #D97706; border: 1px solid rgba(245,158,11,.18); }
.co-label.pink   { background: var(--pink-pale);   color: var(--pink); border: 1px solid rgba(236,72,153,.18); }

.co-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    color: var(--dark);
    letter-spacing: .01em;
    line-height: 1.25;
    margin-bottom: 14px;
}
.co-title .hl-blue   { color: var(--blue); }
.co-title .hl-purple { color: var(--purple); }
.co-title .hl-green  { color: var(--green); }
.co-title .hl-orange { color: var(--orange); }
.co-title.white { color: var(--white); }
.co-sub {
    font-family: var(--font-kr);
    font-size: .92rem; color: var(--gray-500);
    line-height: 1.85; max-width: 540px;
}
.co-sub.white { color: rgba(255,255,255,.75); }
.co-header { margin-bottom: 56px; }
.co-header.center { text-align: center; }
.co-header.center .co-sub { margin: 0 auto; }

/* ====================================================
   FEATURES / WHY
   ==================================================== */
.co-why { background: var(--bg); }
.co-why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.co-why-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 2px solid transparent;
    transition: var(--trans);
    position: relative;
    overflow: hidden;
}
.co-why-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 0 0 2px 2px;
    transition: var(--trans);
    transform: scaleX(0);
    transform-origin: left;
}
.co-why-card.c-blue::after   { background: var(--blue); }
.co-why-card.c-purple::after { background: var(--purple); }
.co-why-card.c-green::after  { background: var(--green); }
.co-why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.co-why-card:hover::after { transform: scaleX(1); }
.co-why-card.c-blue:hover   { border-color: rgba(59,130,246,.2); }
.co-why-card.c-purple:hover { border-color: rgba(139,92,246,.2); }
.co-why-card.c-green:hover  { border-color: rgba(16,185,129,.2); }
.co-why-icon {
    width: 58px; height: 58px;
    border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
    transition: var(--trans);
}
.c-blue  .co-why-icon { background: var(--blue-pale);   color: var(--blue); }
.c-purple .co-why-icon{ background: var(--purple-pale); color: var(--purple); }
.c-green .co-why-icon { background: var(--green-pale);  color: var(--green); }
.co-why-card:hover .co-why-icon { transform: scale(1.1) rotate(-5deg); }
.co-why-card h3 { font-family: var(--font-display); font-size: 1.15rem; color: var(--dark); margin-bottom: 10px; }
.co-why-card p  { font-family: var(--font-kr); font-size: .84rem; color: var(--gray-500); line-height: 1.8; }

/* ====================================================
   COURSES
   ==================================================== */
.co-courses { background: var(--white); }
.co-courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.co-course-card {
    background: var(--white);
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--trans);
}
.co-course-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.co-course-thumb {
    height: 160px;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
    flex-direction: column; gap: 10px;
}
.co-course-thumb .icon { font-size: 2.4rem; opacity: .5; color: var(--white); }
.co-course-thumb-label {
    font-family: var(--font-kr); font-size: .65rem; font-weight: 700;
    letter-spacing: .14em; text-transform: uppercase;
    color: rgba(255,255,255,.6);
}
.co-course-thumb.blue   { background: linear-gradient(135deg, #3B82F6, #2563EB); }
.co-course-thumb.purple { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.co-course-thumb.green  { background: linear-gradient(135deg, #10B981, #059669); }
.co-course-thumb.orange { background: linear-gradient(135deg, #F59E0B, #D97706); }
.co-course-thumb.pink   { background: linear-gradient(135deg, #EC4899, #DB2777); }
.co-course-thumb.teal   { background: linear-gradient(135deg, #14B8A6, #0F766E); }
.co-course-body { padding: 22px 20px; }
.co-course-meta {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 10px;
}
.co-course-tag {
    font-size: .65rem; font-weight: 700;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    letter-spacing: .04em;
}
.co-course-tag.blue   { background: var(--blue-pale);   color: var(--blue-dark); }
.co-course-tag.purple { background: var(--purple-pale); color: var(--purple); }
.co-course-tag.green  { background: var(--green-pale);  color: var(--green); }
.co-course-tag.orange { background: var(--orange-pale); color: #D97706; }
.co-course-tag.pink   { background: var(--pink-pale);   color: var(--pink); }
.co-course-lv {
    font-size: .65rem; color: var(--gray-400); font-weight: 600;
    display: flex; align-items: center; gap: 4px;
}
.co-course-card h3 { font-family: var(--font-kr); font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; line-height: 1.45; }
.co-course-card p  { font-size: .8rem; color: var(--gray-500); line-height: 1.7; margin-bottom: 16px; }
.co-course-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding-top: 14px; border-top: 1px solid var(--gray-100);
}
.co-course-price { font-family: var(--font-display); font-size: 1.2rem; color: var(--dark); }
.co-course-price small { font-family: var(--font-kr); font-size: .65rem; color: var(--gray-400); display: block; }
.co-course-students { font-size: .72rem; color: var(--gray-400); font-weight: 600; }

/* ====================================================
   INSTRUCTORS
   ==================================================== */
.co-instructors { background: var(--bg); }
.co-instructors-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.co-instructor-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: center;
    transition: var(--trans);
    border: 2px solid transparent;
}
.co-instructor-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(59,130,246,.2); }
.co-instructor-avatar {
    height: 120px;
    display: flex; align-items: center; justify-content: center;
    font-size: 3rem; color: rgba(255,255,255,.3);
}
.co-instructor-avatar.blue   { background: linear-gradient(135deg, #3B82F6, #2563EB); }
.co-instructor-avatar.purple { background: linear-gradient(135deg, #8B5CF6, #7C3AED); }
.co-instructor-avatar.green  { background: linear-gradient(135deg, #10B981, #059669); }
.co-instructor-avatar.orange { background: linear-gradient(135deg, #F59E0B, #D97706); }
.co-instructor-body { padding: 18px 16px 22px; }
.co-instructor-name { font-family: var(--font-display); font-size: 1rem; color: var(--dark); margin-bottom: 4px; }
.co-instructor-role { font-size: .75rem; color: var(--gray-400); font-weight: 600; margin-bottom: 10px; }
.co-instructor-tags { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.co-instructor-tag {
    font-size: .62rem; font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
}

/* ====================================================
   REVIEWS
   ==================================================== */
.co-reviews { background: var(--white); }
.co-reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.co-review-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-100);
    padding: 26px 22px;
    transition: var(--trans);
    position: relative; overflow: hidden;
}
.co-review-card:hover { box-shadow: var(--shadow-md); border-color: var(--gray-200); transform: translateY(-3px); }
.co-review-top {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 14px;
}
.co-review-stars { display: flex; gap: 3px; }
.co-review-stars i { color: var(--orange); font-size: .75rem; }
.co-review-badge {
    font-size: .62rem; font-weight: 700;
    padding: 3px 10px; border-radius: var(--radius-full);
}
.co-review-text { font-family: var(--font-kr); font-size: .84rem; color: var(--gray-600); line-height: 1.8; margin-bottom: 18px; }
.co-review-author { display: flex; align-items: center; gap: 10px; }
.co-review-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display); font-size: .88rem; color: var(--white); flex-shrink: 0;
}
.co-review-name { font-family: var(--font-kr); font-size: .84rem; font-weight: 700; color: var(--dark); }
.co-review-course { font-size: .7rem; color: var(--gray-400); }

/* ====================================================
   CTA BANNER
   ==================================================== */
.co-cta {
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 60%, #4338CA 100%);
    position: relative; overflow: hidden;
}
.co-cta-dots {
    position: absolute; inset: 0;
    background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
}
.co-cta-blob {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.co-cta-blob-1 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(139,92,246,.3) 0%, transparent 70%);
    top: -150px; right: -100px;
}
.co-cta-blob-2 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(59,130,246,.2) 0%, transparent 70%);
    bottom: -100px; left: 15%;
}
.co-cta-inner {
    max-width: 1200px; margin: 0 auto;
    padding: 90px 40px;
    position: relative; z-index: 2;
    display: grid;
    grid-template-columns: 1fr 460px;
    gap: 72px; align-items: center;
}

/* 폼 박스 */
.co-form-box {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px 36px;
    box-shadow: var(--shadow-xl);
}
.co-form-box-header { text-align: center; margin-bottom: 24px; }
.co-form-box-icon {
    width: 52px; height: 52px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; color: var(--white);
    margin: 0 auto 12px;
    box-shadow: 0 4px 14px rgba(59,130,246,.3);
}
.co-form-box-title { font-family: var(--font-display); font-size: 1.35rem; color: var(--dark); margin-bottom: 4px; }
.co-form-box-sub { font-size: .77rem; color: var(--gray-400); }

.co-form-group { margin-bottom: 12px; }
.co-form-group label { display: block; font-size: .78rem; font-weight: 700; color: var(--gray-700); margin-bottom: 5px; }
.co-form-group label span { color: var(--red); }
.co-form-group input,
.co-form-group select,
.co-form-group textarea {
    width: 100%;
    padding: 11px 15px;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-kr);
    font-size: .84rem; color: var(--gray-700);
    outline: none; transition: var(--trans);
    appearance: none;
}
.co-form-group input::placeholder,
.co-form-group textarea::placeholder { color: var(--gray-300); }
.co-form-group input:focus,
.co-form-group select:focus,
.co-form-group textarea:focus {
    border-color: var(--blue);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--blue-pale);
}
.co-form-group textarea { resize: none; height: 80px; }
.co-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.co-form-check { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 14px; }
.co-form-check input[type="checkbox"] { width: auto; margin-top: 2px; flex-shrink: 0; accent-color: var(--blue); }
.co-form-check label { font-size: .74rem; color: var(--gray-500); cursor: pointer; line-height: 1.5; margin-bottom: 0; }
.co-form-check a { color: var(--blue); text-decoration: underline; }
.co-form-submit {
    width: 100%; padding: 15px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    color: var(--white);
    font-family: var(--font-kr); font-size: .92rem; font-weight: 900;
    border: none; border-radius: var(--radius-full);
    cursor: pointer; transition: var(--trans);
    box-shadow: 0 4px 16px rgba(59,130,246,.3);
    letter-spacing: -.01em;
}
.co-form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,.45); }

/* CTA 포인트 리스트 */
.co-cta-points { display: flex; flex-direction: column; gap: 14px; margin: 28px 0 36px; }
.co-cta-point { display: flex; align-items: center; gap: 12px; font-family: var(--font-kr); font-size: .88rem; color: rgba(255,255,255,.8); }
.co-cta-point-dot {
    width: 26px; height: 26px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: .65rem;
}
.co-cta-point-dot.blue   { background: rgba(59,130,246,.25); color: var(--blue-light); }
.co-cta-point-dot.purple { background: rgba(139,92,246,.25); color: #C4B5FD; }
.co-cta-point-dot.green  { background: rgba(16,185,129,.2);  color: #6EE7B7; }
.co-cta-point-dot.orange { background: rgba(245,158,11,.2);  color: #FCD34D; }

/* ====================================================
   BOARD
   ==================================================== */
.co-board-section { background: var(--bg); }
.co-board-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.co-board-box {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-100);
    padding: 28px 26px;
    transition: var(--trans);
}
.co-board-box:hover { box-shadow: var(--shadow-md); }
.co-board-box-hd {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 18px; padding-bottom: 14px;
    border-bottom: 2px solid var(--gray-100);
    position: relative;
}
.co-board-box-hd::after {
    content: ''; position: absolute;
    bottom: -2px; left: 0;
    width: 36px; height: 2px;
    border-radius: 2px;
}
.co-board-box.b-blue .co-board-box-hd::after  { background: var(--blue); }
.co-board-box.b-purple .co-board-box-hd::after { background: var(--purple); }
.co-board-box-hd h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--dark); }
.co-board-box-hd a {
    font-size: .72rem; font-weight: 700;
    padding: 5px 12px; border-radius: var(--radius-full);
    transition: var(--trans);
}
.b-blue  .co-board-box-hd a { color: var(--blue);   background: var(--blue-pale); }
.b-purple .co-board-box-hd a { color: var(--purple); background: var(--purple-pale); }
.b-blue  .co-board-box-hd a:hover { background: var(--blue);   color: var(--white); }
.b-purple .co-board-box-hd a:hover { background: var(--purple); color: var(--white); }

/* ====================================================
   FOOTER
   ==================================================== */
#ft {
    background: var(--dark);
    color: rgba(255,255,255,.45);
    padding-top: 64px;
}
#ft_wr {
    max-width: 1200px; margin: 0 auto;
    padding: 0 40px 52px;
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 52px;
}
#ft_link { display: none; }
#ft_company h2 { display: none; }
.ft_info { font-size: .76rem; line-height: 2; color: rgba(255,255,255,.26); }
.ft-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.ft-brand-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: .9rem; color: var(--white);
}
.ft-brand-name { font-family: var(--font-display); font-size: 1.2rem; color: var(--white); letter-spacing: .01em; }
.ft-desc { font-size: .8rem; color: rgba(255,255,255,.3); line-height: 1.9; margin-bottom: 20px; }
.ft-contact { font-size: .78rem; color: rgba(255,255,255,.3); line-height: 2; }
.ft-contact strong { color: rgba(255,255,255,.5); }
.ft-contact a { transition: var(--trans); }
.ft-contact a:hover { color: var(--blue-light); }
.ft-col h3 {
    font-size: .62rem; font-weight: 700;
    letter-spacing: .18em; text-transform: uppercase;
    color: rgba(255,255,255,.3); margin-bottom: 16px;
    padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.ft-col ul { list-style: none; padding: 0; }
.ft-col ul li { margin-bottom: 10px; }
.ft-col ul li a { font-size: .8rem; color: rgba(255,255,255,.35); transition: var(--trans); }
.ft-col ul li a:hover { color: var(--blue-light); padding-left: 4px; }
#ft_copy {
    max-width: 1200px; margin: 0 auto;
    padding: 20px 40px;
    border-top: 1px solid rgba(255,255,255,.06);
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; flex-wrap: wrap;
}
#ft_copy span { font-size: .72rem; color: rgba(255,255,255,.2); }
.ft-policy { display: flex; gap: 16px; }
.ft-policy a { font-size: .72rem; color: rgba(255,255,255,.27); transition: var(--trans); }
.ft-policy a:hover { color: var(--blue-light); }

/* Back to Top */
#top_btn {
    position: fixed; bottom: 36px; right: 36px;
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    color: var(--white);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: .85rem; z-index: 999;
    opacity: 0; transform: translateY(14px);
    transition: var(--trans);
    box-shadow: 0 4px 16px rgba(59,130,246,.4);
}
#top_btn.visible { opacity: 1; transform: translateY(0); }
#top_btn:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(59,130,246,.5); }

#hd_login_msg {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--blue); color: var(--white);
    text-align: center; font-size: .78rem; padding: 7px 16px; z-index: 999;
}
#hd_login_msg a { color: rgba(255,255,255,.7); margin-left: 12px; text-decoration: underline; }

.sound_only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
#aside > div { background: var(--white); border: 2px solid var(--gray-100); border-radius: var(--radius-md); padding: 22px; margin-bottom: 18px; }
.lt_wr { float: left; width: 32%; border: 2px solid var(--gray-100); border-radius: var(--radius-md); padding: 18px; margin-bottom: 18px; background: var(--white); transition: var(--trans); }
.lt_wr:hover { border-color: var(--blue); box-shadow: var(--shadow-sm); }
.latest_wr::after { content: ''; display: table; clear: both; }

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 1024px) {
    #hd_wrapper, .co-section-inner, #ft_wr, #ft_copy, .co-cta-inner { padding-left: 24px; padding-right: 24px; }
    #wrapper { padding: 0 24px; }
    .co-hero-illust { display: none; }
    .co-why-grid { grid-template-columns: repeat(2, 1fr); }
    .co-courses-grid { grid-template-columns: repeat(2, 1fr); }
    .co-instructors-grid { grid-template-columns: repeat(2, 1fr); }
    .co-reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .co-cta-inner { grid-template-columns: 1fr; gap: 48px; }
    #ft_wr { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
    #hd_wrapper { padding: 0 20px; }
    #gnb { display: none; }
    .gnb_mnal { display: block; }
    .hd_login { display: none; }
    #wrapper { padding: 0 20px; }
    #container_wr { flex-direction: column; }
    #aside { width: 100%; }
    .co-section { padding: 64px 0; }
    .co-section-inner { padding: 0 20px; }
    .co-hero-inner { padding: 100px 20px 80px; }
    .co-why-grid { grid-template-columns: 1fr; }
    .co-courses-grid { grid-template-columns: 1fr; }
    .co-instructors-grid { grid-template-columns: repeat(2, 1fr); }
    .co-reviews-grid { grid-template-columns: 1fr; }
    .co-board-grid { grid-template-columns: 1fr; }
    .co-cta-inner { padding: 64px 20px; }
    .co-form-row { grid-template-columns: 1fr; }
    #ft_wr { grid-template-columns: 1fr; gap: 28px; padding: 0 20px 36px; }
    #ft_copy { padding: 18px 20px; flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
    .co-hero h1 { font-size: 2.2rem; }
    .co-hero-btns { flex-direction: column; align-items: flex-start; }
    .co-instructors-grid { grid-template-columns: 1fr 1fr; }
    #top_btn { bottom: 20px; right: 20px; }
}